Daily Practice · GCSE Science
June 1998 - GCSE Science 5-a-day
Every sheet in June 1998
The same date always regenerates the same five questions, so a sheet you print today is the sheet a classmate prints tomorrow.
- 1st June 1998Explain why anaerobic respiration releases much less energy per glucose molecule than aerobic respiration.
- 2nd June 1998A person's blood glucose concentration is 4.8 mmol/dm^3 before breakfast and 7.2 mmol/dm^3 after breakfast. Calculate the increase in blood glucose concentration.
- 3rd June 1998State what is meant by the term ecosystem.
- 4th June 1998State what is meant by sustainable development.
- 5th June 1998Describe metallic bonding.
- 6th June 1998State the pH value of a neutral solution.
- 7th June 1998State whether breaking a chemical bond requires energy or releases energy.
- 8th June 1998Propene (C3H6) reacts with steam in the presence of a catalyst. Name the catalyst, and name the type of compound formed.
- 9th June 1998Explain, in terms of infrared radiation, how greenhouse gases keep the Earth warm.
- 10th June 1998A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
- 11th June 1998Why does the national grid transmit electricity at a very high potential difference?
- 12th June 1998Why is the atomic model a good example of how scientific models change?
- 13th June 1998State two factors, other than depth, that affect the pressure at a given point in a liquid.
- 14th June 1998State the name of the rule used to find the direction of the force on a current-carrying wire in a magnetic field, and name the three quantities it relates.
- 15th June 1998Define the independent variable.
- 16th June 1998An amylase reaction is complete after 200 seconds. Calculate the rate of reaction using rate = 1000 / time.
- 17th June 1998Name the type of pathogen that causes malaria.
- 18th June 1998State what is meant by negative feedback.
- 19th June 1998Name the scientist who proposed the three-domain system of classification, and name the three domains.
- 20th June 1998An atom has atomic number 11 and mass number 23. State the number of protons.
- 21st June 1998Why are the noble gases unreactive?
- 22nd June 1998How many atoms are there in 0.5 mol of helium?
- 23rd June 1998State whether the combustion of methane is exothermic or endothermic.
- 24th June 1998State the effect of increasing the temperature on the position of equilibrium of a reaction whose forward reaction is exothermic.
- 25th June 1998Describe the test, and the positive result, for ammonium ions.
- 26th June 1998Convert 3.5 kJ into joules.
- 27th June 1998Two resistors are connected in parallel across a 12 V battery. State the potential difference across each resistor.
- 28th June 1998How is the temperature of a gas related to the motion of its molecules?
- 29th June 1998A car's velocity increases from 8 m/s to 20 m/s over 4 seconds. Calculate its acceleration.
- 30th June 1998State one medical use of X-rays and one safety precaution taken when X-rays are used in a hospital.